Some Limitations on the Use of Damping in Short Pressure Points

Some Limitations on the Use of Damping in Short Pressure Points
Author: Ted W. Nyland
Publisher:
Total Pages: 36
Release: 1971
Genre: Airplanes
ISBN:

The analytical study described in this report examines changes in the useful frequency response of short pressure probes resulting from variations in the viscous damping within the probe tube. The study is based on the use of the Bergh and Tijdeman recursion formula, which was modified to allow the addition of arbitrary amounts of viscous loss in any tube section. Results show that the useful response range can be increased with damping but is dependent on the operating temperature and pressure levels. At 300 K, only a 15-percent variation in average pressure is allowable if the useful response is to be a factor of three higher than that of an undamped probe. This variation increases to 20 or 30 percent at temperatures above 600 K. A computer program based on the modified recursion formula is given in an appendix.

AIAA Journal

AIAA Journal
Author: American Institute of Aeronautics and Astronautics
Publisher:
Total Pages: 1144
Release: 2000
Genre: Aeronautics
ISBN:

Congressional Record

Congressional Record
Author: United States. Congress
Publisher:
Total Pages: 1470
Release: 1966
Genre: Law
ISBN:

The Congressional Record is the official record of the proceedings and debates of the United States Congress. It is published daily when Congress is in session. The Congressional Record began publication in 1873. Debates for sessions prior to 1873 are recorded in The Debates and Proceedings in the Congress of the United States (1789-1824), the Register of Debates in Congress (1824-1837), and the Congressional Globe (1833-1873)